Johnny Manziel's Autographed Used Truck ... Rakes In Big Money!!

Johnny Manziel still has the golden touch -- because his autographed used Nissan truck just sold for WAYYYY over market value ... TMZ Sports has learned.

As we previously reported, Manziel traded in his 2014 Nissan Titan SL earlier in the month at Airport Nissan of Cleveland -- and the dealership decided to put up for auction on eBay.

Now get this ... Edmunds lists value of the truck somewhere between $32k and $36k -- but Johnny's ride ended up hauling in $42,500!!

We spoke with Bernie Moreno, the owner of the dealership, who tells us the people who bought the truck are from Cleveland -- and are "HUGE Johnny Manziel fans" ... and their pumped about their new whip.