Ditto KBintheSLC, but I've had it a tad longer. Buy the 870 Express. It's worth the (low) price of admission.
I don't much care for Remington as a gunmaker, their QC, their marketing and managment philosophies, etc. I don't even look at Remington products when I'm looking for a gun at this point, and I have good reasons for that.
BUT... My 870 Express has been worth every penny of the $235 after rebate that I paid for it new. I've had thousands of rounds through it, and there are serious wear marks on the wood stock where my hands hold it. It's not a Wingmaster, but I wouldn't pay for a new Wingmaster. Before I spend the money on a fancy version of a cheap pump gun, I'll take a new Ithaca 37 or a semiauto. Besides, I don't trust Remington to put it together well enough to be worth the cash.
My Express has gotten stuck shells, with Winchester Universal bulk packs, like everyone else's. It's not the gun's fault if the shells are made out-of-spec, and they are.
I have a shell size gauge because I sometimes handload my shotshells. Those POS Winchesters aren't even sized when they make them. I don't blame the gun -- because it has NEVER had ANY trouble with
properly-made shells, either handloads or factory, expensive or cheap.
The Express is worth buying, IMO, and I can be pretty picky about what is and isn't.
So is a used Wingmaster for a decent price. However, barrels have changed over the years. I'd really only get one with the LC barrel on it; I have no real use for a fixed-choke pump gun, and the non-LC RemChoke barrel feels no better than an Express barrel.