Emax

I got mine for $125 USD on E-bay. It came with 100+ disks.

Any given 12-bit sampler will give you "that sound"- the E-max, Emulator II, 
Akai S-900 or S-950 (you lose the analogue filter but gain time-stretching).

You may want to check out the Akai S-612. I have one that I got for only $30 
USD on E-bay a while back. It's mega lo-fi, and only gives you 10 seconds at 
the lowest, muddiest, crunchiest sampling rate, but it's got an analogue 
filter and fun "splicing" sliders that you can move while the sample plays to 
give you crazy squeals and stutters.

Andrew