It's probably worth noting in this thread, that the answer to this question for most items can be found using a combination of the following (perhaps the OP can edit his first post):
How about Uforce in its box, without the Power Bar or Flight stick,
ive seen some other ones starting at 30$ on ebay but i'd like to know if thats its real value
2600 Jr. - NES - SNES(x2) - Nintendo 64(x3) - Gamecube(x2) - Wii - Sega Genesis (Model 2) - PSOne (Model 1) - PS2 Slim - Game Boy - Game Boy Pocket - Game Boy Color - GBA(x2) - GBA SP(x2) - DS - DSLite - PC
I saw a guy selling a U-Force complete in the box for $50 today at the flea market. This particular seller usually overprices by about $10 to $20 though.
Haha, I like the attempt to make it fancy. It's a product oc the 70s, but it's gray with gold instead of brown or wood grain with gold, plus the "Executive Games". Nice. I have no idea if this particular pong game is one that's worth something, or if its just one that blends into the tons of pong machines that flooded the market at the time. I haven't seen a picture of that particular one before though.