Hey Steph.  I bought a Tascam 424 MKII off the classified ads on Harmony-Central.  I called the guy and talked to him first and I only paid $225 and shipping fees.  If you shop around you can get a good deal.  Also check you local music stores.  They sell 4 tracks all the time, and the people bring them back and trade them in on bigger units.  They sell the trade-ins at a good price.  Beware when dealing on the Internet.  You can get scammed.  Use good judgement.