I found a set on Ebay as well - still in the BMV envelope (
) - needed some cleaning but with some scrubbing they look new.
Had to go to the BMV with the plate so they could take a photo copy of the 'old plates' and I also have to keep the actual historic tags in the car at all times (glovebox still in wrapper) - in case a LEO wants to see them.
I run both plates, but I didn't hear that I HAD to run them - maybe it depends on the counter person or the county in Ohio.
I have seen year plates and antique plates here in Ohio in the winter - since most of the plates are covered by snow anyway - but not sure what the penalty would be if you 'got caught'...(not worth the risk in my opinion).