I picked up a used SLB200 on ebay for about $800, but it didn't come with the body rest/frame unit, and I didn't know it had some other issues like a replacement nut that was done terribly, as well as a replacement endpin and fitting (It looks like an Engelhardt endpin and fitting was added.) that was just terrible. So, I crafted my own body rest to stop the spinning when playing arco, crafted a new endpin out of 1/2" round bar. It is now with a local luthier that is going to readjust the nut for me for just $20, and I'm having a new set of Zyex lights put on too. So with the new strings and other mods I'm not far from an additional $200 in. Although I haven't played it very much yet, especially amplified, what I like about it for an EUB is that it is chambered (the body is mahogany and completely hollow), so to me, there is an acoustical feel to it, especially compared to other EUBs that have a slab of solid wood for a body like a Stagg EUB, which I also own. And, the Yamaha preamp is pretty good sounding too, to my surprise (I hate the preamp in the Stagg).
If you can find a used Yamaha on the cheap I think they are pretty nice. But even used they can be pretty pricey. Once I get mine back we will see if it replaces my Stagg as my weekend beach bass. You don't mention why you want an EUB, but I'll off an opinion if it were me; I wouldn't buy any EUB as your regular bass for learning how to play upright. For the price of a new Yamaha EUB you can get a nice laminate or even hybrid upright. The only reason I have an EUB is so I have an instrument to practice on that is not the size of a full upright to travel with on weekends to the beach. A true upright (laminate, hybrid or carved) has a feel and sound unlike all EUBs. The only thing that sounds and feels like an upright bass is an upright bass. You'll be missing out on the true nature of what it is to play upright by learning solely on an EUB, in my opinion.
Good luck...
