Buy magazines of unknown quality or origin? NOT!!!!
The key to the functioning of a 1911 is the magazine. I spent a bunch of money on my Kimber Custom Stainless II, so I'm not going to start cutting corners on magazines.
Currently, I have the original 7 round stainless mag that came with my pistol, an 8 round stainless Kimber mag I purchased with the pistol and an 8 round Chip McCormick stainless. These three mags all feed perfectly. Not a single mis-feed in all of the thousands of rounds I have put through this pistol. That includes being dropped on concrete floors in competition. I may pick up another magazine or two. If I do, they will be either Chip McCormick or Wilson Combat! No guessing games here!!