I'm not proud to say this but I used to collect the earlier model B&D Workmates!, it all started 10-12 years ago when I did a lot of woodworking and found these foldable tables essential to have in a my small wood shop, I still have 8 of them but 4 are put away in my shed and 4 are currently used in my shop.
One is modified as a make shift welding table , one is for holding two belt grinders, the other 2 are my temporary worktable .
The "H" frame design was( and still is) very popular/ collectable , I would not hesitate to buy one if the price was reasonable.