How loud do you need to play?
You can find some incredible deals on some of the old Peavey bass amps. I have a Combo 300 with a 115 BW speaker that was like new when I bought it and I paid less than $200 for it. It's enough for most clubs, and there's a couple of things I can do to it to maKe it more powerful. If I need more, I simple run another 8 ohm 115 cab for 300WRMS. Heck, you can find these amps so cheap, I'd bet you could find TWO of them for not much more that your budget!
But the cool thing is, I can use one of Peavey's smaller amps, like the Minx, Basic, Studio, or even a Bandit to bi-amp the Combo 300 by using its built-in crossover. Biamping will give me a lot more headroom, punch and projection--even if I add just a 20-watt amp for the high-end.
The Combo 300, TNT, DataBass, and most of their BASS heads had this feature. The amps are well made, and super-value bargains in the used market.
With this kind of budget, you can't go wrong with good Peavey gear.
Bill