what a 1970 plymouth roadrunner is worth...this one has been stored for years and is in very good condition...it has a 440 hemi engine and a good interior...lots of old chrome on the engine and it says MOPAR on the air cleaner...body is in excellent shape and good paint too...so if anyone has an idea how much its worth i would love to sell it.
There's no established "price guide" for the endless variety of older and antique used vehicles as their value is so wholly subjective and dependent upon so many variables including whatever happens to be popular at any given moment in time.
The best way to determine its value would be to draw a consensus from any similar vehicles being offered for sale. Web sites dedicated to older and "classic" vehicles like oldride.com, AutoTrader Classic, and others are likely to provide you with come comparative examples, but given that so much is dependent upon things like the particular rarity of a trim level or color, engine type, serial number matching, and other often-arcane criteria, the best you will be able to derive is like to be a possible value range rather than a specific price.
A quick scan of oldride.com shows 1970 Roadrunners varying in asking prices from $4,500 all the way up to $90,000.
Best of luck. I hope this helps.
15th Annual Mopar Nationals Jacket embroider 70 cuda Indianapolis aug 11-13 1995, NOS Mopar Charger Roadrunner Super Bee Restoration Guide 68 69 70 Hemi Six Pack, Mopar Action Magazine April 2009 Rare '69 Hemi 4-Speed Road Runner Ragtop, 14X5.5 MOPAR RALLY WHEEL DODGE PLYMOUTH 440 383 318 HEMI CHARGER GT ROADRUNNER , MOPAR PLYMOUTH ROAD RUNNER LEATHER KEY CHAIN hemi KEY RING FOBS HOTROD ratrod, PLYMOUTH License Plate Mopar Hemi Road Runner GTX Savoy, 69 MOPAR STEERING WHEEL ROADRUNNER CORONET CHARGER DART HEMI GTX CUDA CHRYSLER, 1970 Chrysler Dodge Plymouth Mopar Road Runner Hemi 440 383 Alternator 3438172, original 426 HEMI/440-6 COOLING FAN "#216" 68/6970/71 CUDA/ROADRUNNER/CHARGER, 66 67 68 69 70 Mopar B Body Torque Boxes HEMI Charger Roadrunner front & rears, 71 72 73 74 Mopar B Body Torque Boxes Box HEMI Charger Roadrunner rear set, OE 426 HEMI/440 COOLING FAN 68/69 ROADRUNNER/CHARGER 68-69-70-71-72 dart/DUSTER, 1968 69 Plymouth Hemi Road Runner Steering Wheel RM21 426 Post Coupe Dodge Mopar, NOS Mopar Pentastar Key Set 66 67 68 69 70 71 72 73 74 Chrysler Dodge Plymouth, NOS OEM Mopar Pentastar 67 68 69 70 71 72 73 74 Dodge Chrysler Plymouth Cuda, 68 69 Road Runner GTX hood N-96 air grabber 440 426 hemi 383 413 MOPAR big block, Mopar Plymouth 69 440 383 Air grabber N-96 hood vents GTX Road Runner 426 hemi , Mopar Plymouth 69 440 Air grabber air cleaner GTX Road Runner CUDA shaker hemi, ROAD RUNNER 383 440 426 HEMI MOPAR PLYMOUTH WATCH WITH LEATHER BAND, ROAD RUNNER 426 HEMI ENGINE MOPAR PLYMOUTH WATCH WITH LEATHER BAND, 1968 1969 1970 1971 ROAD RUNNER 383 440 426 HEMI MOPAR, Mopar HEMI ROADRUNNER GTX CHARGER SS Black SLOTTED Tips, 1961-1980? NOS MOPAR CHRYSLER DODGE PLY LIGHTED FLUORESCENT DEALER SIGN;BLEMS, 69 dodge charger AM RADIO mopar b body super bee roadrunner gtx fm 68 hemi , OE 426 HEMI WATER PUMP PULLEY 68/69/70/71 CHARGER/ROADRUNNER/CUDA/CHALLENGER/GTX, MOPAR 70 CUDA CHARGER DART ROAD RUNNER GTX RT SUPER BEE HEMI COLUMN KEY LIGHT , MOPAR HEMI CUDA ROADRUNNER GTX RT CHARGER SUPER BEE RALLYE SPORT REMOTE MIRROR, MOPAR HEMI DART CUDA RT 440 GTX ROADRUNNER CHARGER CONSOLE 6 PACK SHIFTER, MOPAR 72 CUDA ROAD RUNNER GTX HEMI GRABBER 440 6 400 340 HOOD GRILL LATCH , MOPAR HEMI DART CUDA RT 440 GTX ROADRUNNER CHARGER CONSOLE SHIFTER SWITCH LIGHTS, Plymouth : Satellite SPORT 4 DOOR SEDAN 1970 PLYMOUTH SPORT SATELLITE MOPAR ROAD RUNNER GTX DODGE HEMI RAT HOT ROD DRAG, OE HEMI ALTERNATOR PULLEY 68/69/70/71 ROADRUNNER/CUDA/challenger/cornet/charger, MOPAR 426 STREET HEMI ALTERNATOR PULLEY CUDA CHALLENGER GTX ROAD RUNNER , 1970/69/CHARGER HEMI-R/T CONSOLE SHIFTER FACTORY ORIG. AT.68/69GTX&ROAD RUNNER, 1970 69 CHARGER/DART GTS 340/383 HEMI-R/T CONSOLE SHIFTER MOUNT BRACKET AT., Plymouth Road Runner 69 70 1969 Horn Center Pad Roadrunner 383 Hemi 426 A12 1970, NEW CLASSIC PURPLE 1971 PLYMOUTH ROAD RUNNER CUSTOM KEYCHAIN fob KEY MOPAR HEMI, HIGH PERFORMANCE 426 HEMI SEW/IRON ON PATCH DART MOPAR ROADRUNNER GTX BARRACUDA, 1970 MOPAR CUDA CHALLENGER ROADRUNNER GTX 383 440 HEMI 4-SPD BELLHOUSING BOLTS, ●● NOS MOPAR Fuel Pump Bolts 426 Hemi 440 340 --- Road Runner 'Cuda Charger etc., NEW CLASSIC RED 1971 PLYMOUTH ROAD RUNNER CUSTOM KEYCHAIN fob KEY MOPAR HEMI, MOPAR Cuda Road Runner Big Block Hemi Fuel Pump, Mopar 1969 Plymouth Road Runner Satellite Front Bench Seat Covers Hemi , 66 67 68 69 70 mopar rear frame reinforcement plates 426 HEMI Charger Roadrunner, 1970 ROADRUNNER GTX HEMI THIN METAL HOOD INSERT DECAL EMBLEM BADGE , 1970 Plymouth Superbird Road Runner NOS MoPar Front Valance HEMI RH Chryco, 66 67 68 69 70 Mopar B Body Torque Boxes Box HEMI Charger Roadrunner front set, 66 67 68 69 70 Mopar B Body Torque Boxes Box HEMI Charger Roadrunner rear set, Plymouth GTX 67 73 hemi 440 Roadrunner Charger mopar t, Plymouth GTX 67 73 hemi 440 Roadrunner Charger mopar t,