My suggestion is that there should be more specialist collectors within Skyrim like Umbacano in Oblivion so that there are places to get rid of them
Another idea I like is the Idea of one of the cities to have an auction house whereby you can auction them off and would gamble on getting their value back in some cases you might get slighlty less or maybe more. You yourself couls take part in these auctions where you could bid for artifacts and I mean proper artifacts that would cost 100,000, these would be rare and only come up rarely but it would also solve the problem of having too much gold. In my most recent Oblivion file I have put 150 hours or so into it and have just under 500,000 gold coins and nothing to spend it on.
My final recommendation is that they should include silver coins as well to give a more accurate indication of an items worth with 100 silver obviously being equal to 1 gold coin. It just seems a bit random a cheese wedge worth 2 gold should be more like 20 silver... still I am starting to ramble any feed back is appreciated.