Yeah, tippmanns are built like tanks since they are made for CO2 and are the typical rental guns. They aren't the fastest, lightest, or most accurate, but they get the job done when playing for fun. If you were trying out for a speedball team with a tippmann 98 then you'll get laughed at though.
I have a tippmann98 but I also have a few others. A few I bought as used and got badly burned on though. Couple I was able to salvage and a couple I wasn't. My list of markers:
Bought the following new:
tippmann 98
Valken Proton
Empire Mini
Piked up the following used:
Angel Fly (came with a messed up solenoid and wasn't worth fixing)
Mac Droid (came with a busted board and wasn't worth fixing)
Timmy (came with a messed up cup seal and some bad o-rings. Those were easy enough to fix. The LCD is also bad, but doesn't stop operation of the marker and isn't worth fixing)
Timmy Ripper 3 (came with a bad stack but a replacement was cheap enough)
Ego 08 (came perfect and was the only one that did)
Just my word of caution to anyone that intends to ever buy used... I wouldn't recommend it. I even tried to make sure I picked markers from those with "good" feedback and got burned more often than not. Never had this problem with other things I've bought used online, just paintball guns.
Been awhile since I last played though. Would probably have to buy a new tank since my old tanks are probably not re-testable at this point.