Personally, I wouldn't let my non ported blued receiver 28" 1187 Sporting Clays leave my hands for $500. You did fine on it and $500 is an excellent buy. They shoot really well, don't heat up too much, function well shooting 1 oz or 1 1/8 oz loads, easy to maintain, don't wear out, ect. As Virginian said, they were basically an 1100 and got a bad rap during that time because of the cheaper/lower grade of 1187's which were being produced.
I'm a Winchester shotgun guy at heart, but probably shoot that 1187 Sporting Clays better than any of my Winchester model 12, 42 or 50 shotguns.
Normally I use it as my dedicated 15 yard Trap gun. I shot a local charity Trap shoot back in 2000 at Forest City Gun Club in Savannah, GA and shot well enough to make the top 10 of about 80-100 shooters. I ended up placing 2nd with that gun, from all the way back at 27 yards.