That's really wonderful! I know they sell for quite a bit - I've seen a few go for $50 to $200 in a bidding war! I've only bought one stamp myself, and actually paid $1.00 for it at a stamping garage sale. I had no idea what it was or who Diamonds company was at the time, I just thought it made a fun card idea for when my husband retired and still had his Harley at the time
Here's the image on the card I made - I just call them the motorcycle couple.
Getting old ain't for sissies! by MiamiKel4 - Cards and Paper Crafts at Splitcoaststampers
TFS your find!