Depends how much work you want to do on it. A lot of people love the Saigas, and they feel and look great. I think they're around $250 NIB. But, they come as a "sporter" edition (stock with no pistol grip) that accepts only single stack magazines. So, you need to dremel out the mag well to accept standard double stack AK mags, and you need to do a fair amount of work to get a standard pistol grip & stock combo on there. Or you can pay to get one already converted, but then your price goes WAY up.
If you're not willing (or able) to do all of that, you could get a WASR 10 (double stack, pistol grip, etc.) for around $300 NIB. Some will argue they're not good, but I disagree. They're totally reliable and function well. Mine is as accurate as any AK I've fired. The wood is rough and not finished well, but you could always sand, stain, and polyurethane it if you really care that much. I guess you have to ask yourself what you want to use it for.
Are there better AK variants out there? Absolutely, but they're generally more expensive. I strongly considered a Saiga, but I don't have the tools, the knowledge, or the time to do all of those modifications, and if I paid someone to do it, then I might as well have bought an AR-15 b/c it'd be just as expensive. Plus, 7.62x39 ammo is now outrageously priced and not really much (if at all) cheaper than 5.56mm.
So my vote for best bang for buck goes to the WASR 10 if you want one ready to go with all the AK double stack, pistol grip features for ~$300+. If you don't mind spending more time or money, then I'd buy a Saiga. Just make sure if you get a WASR 10 to check the left side of the trigger to see if it says "Tapco USA G2" (this is a better trigger than the Romanian stock one & it'll have no trigger slap like the Romanian one). Also, make sure the sights are straight, as some have been known to be canted (crooked). A quick check in the store will tell you these 2 things.
Just my $.02