Usually less. Generically if you have sterling silver you get paid less per ounce of net silver than other items. This is because "sterling" can mean any number of impurities mixed in and its more complex to refine. This increases costs, so decreases what they pay you. I have heard if you have larger groups of coins with all the same metal composition in the "sterling" you can get better prices, but odds and ends "sterling" has always brought lower values from the smelters.
I've always found it odd that stackers would shy away from sterling flatware and hollow ware because of it's "shape". I generally buy 4 or 5 sets a year. It feels like it's been getting harder to find really nice, complete sets though. Most of the stuff I see today is "well used" or monogramed; with the wrong monogram.
I stay away from .925 as it doesn't sell as easily as .999 in most coin shops and most collectors I know don't want anything to do with it! Here's how I look at it, .925 is for jewelry and .999 is for stacking!