I recently picked up an unconverted Saiga-12 from my LGS and found my way here by way of the AK Files, the consensus there was this was THE place to learn about all things Saiga-12. It was a consignment sale and came complete with a Wraithmaker 20-round drum, two 5-round Izzy mags and one 10-round AGP Arms magazine. I was quite surprised when I initially handled it as I thought it was new, it barely had the typically safety lever scratch which normally happens after wiping the safety up and down a few times on any AK.
The salesman at the LGS said if I was at all unsatisfied with it that I could return it for a full refund, which was kind of unusual as I've bought quite a few guns there and have never been told that. After doing my research on the AK Files and lurking here, I'm guessing the original owner went in whole hog (hence the Wraithmaker drum!) ran garbage ammo through it and encountered all sorts of malfunctions and was done with it.
I took it to the range yesterday for a brief test fire using 2 boxes (50-rounds) of 2 3/4-inch 00 buck Remington reduced recoil (8-pellet, 3 dram equivalent, FPS unknown, not shown on the box) using all 4 of the magazines/drum. While I won't say that's at all a comprehensive evaluation of the its reliability, I can say that I was pleasantly surprised as it was malfunction free. I didn't futz with the gas regulator and just wanted to run it out of the box. I'm extremely anxious to convert it but wanted to make sure it was going to work out for me and since this is my go-to ammo I figure I'm going to move forward with that as soon as I can figure out which CSS kit I wanna go with.
As a side note the drum weighed just over 5-pounds loaded and while it's a fun range toy I suppose, I'm likely going to sell it as I'm more than happy to run 8 or 10 round mags. I was impressed by the quality and machined billet aluminum construction and it admittedly looks cool as hell, even on an unconverted gun, just not my style.
Lots of great how-to instructions, before and after pictures, etc. here and I'm looking forward to learning as much as I can and applying it, I prefer to "buy once, cry once" whenever I can.