It's clearly yes for me. In any case it's a bargain, especially if the power supply is ok. It will be harder and harder to find even basic a basic working sgi system in the futur, so...
It can be a spare machine (maybe you find a broken one in the futur for 10 bucks so you can add more ram, hard drive, upgradfe to 24bit, found a gio card etc..), and it will be interesting to play with it with Irix 5.3 for example. Of course, if it's a 8bit with 32mb and 540mb hard drive, il will not be a speedrunner, but it"s a lot of fun

. Last point, indy is very compact, so you can easily hide behind something....