I bought mine from Greatmodels a few years ago, so it was new and I paid almost $90 for it. I would say $120 in the secondary market is totally possible, and maybe even on the low side.
I bought the Italeri AC-130 kit a few years back for about $95.00 brand new. I agree that Ebay will be your best bet at finding one at a reasonable price. Personally, I wouldnt spend more than 100 bucks on another one...fit wasnt all that great for the price.
Old Model Kits .com has one for 125.00. That’s about the right price for collectors’ kits… Problem is, most folks ain’t collectors… Truth be told, people are researching what the kits go for on the collector market and price the builder kits with that amount on Ebay…