$11 isn’t bad for a boxed copy that game. The graphics aren’t totally mind blowing, but still pretty cool because it’s like all the old golf games you’ve seen, but with polygon rendered landscapes in 3D (despite the fact that it’s all in red.) The hills really pop out at you, and from what I’ve seen, this VB game has some of the best examples of what the VB is capable of graphics wise. A boxed copy is probably available in the $10-$15 range. I definitely recommend it. (I actually happen to have a boxed edition of Golf, but its from Japan, so I don’t play it all that much because I can’t read the menus. I got it, and 4 other boxed Japanese VB games for $25 if you can believe that.)
Anyway, Space Squash and Water World are more for collectors. Space Squash is fun (although I’ve only played it in emulators,) but it’s a bit pricey because of its rarity. Expect to pay $40-$60 for that one. According to KR1553’s review of Water World here on PVB : “Absolutely horrible and boring game with poor techniques. Besides Virtual Lab by far the worst Virtual Boy game…”. And according to DrAetzn “I think even a 20 year old LCD game has more game play than Waterworld. Who the hell programs such a bad game? Definitely a title noone really needs. If you are not a collector, do yourself a favour and keep your hands away from this.” So you probably don’t want that one. If the reviews don’t deter you, then the $15-$25 pricetag because of its rarity probably will.