Sadly, the nature of this hobby and entertainment in general has become incredibly transient, almost to the point of feeling faddish. For 30+ years, many of us have been enamored by a select few franchises, the primary one being Star Wars. However, since Episode III came out we have seen a marked shift in the nature of the hobby to one in which people are interested in it as long as it is hot, but the minute it is off the air or out of theaters, interest wanes very rapidly. My guess is that is the deal with Spartacus.
Speaking of, I never managed to pick anything up, but there was some REALLY awesome stuff that passed through VIP. The problem for me was that I didn't watch the show so I didn't know any of the characters, which just meant they were cool costumes, but had no emotional appeal for me. There were also SO many that I had difficulty picking something that I really loved... but man, some of those gladiator outfits were just incredible and I am sure they make for great display pieces!
Would love to see some photos from your collection!