A site to check for items like this would be
http://www.expressobeans.com.. there system is great .. Its really set up for having loads of info about releases and sales as well as records of sales .. I see that 1 person on there has the regular Big Trouble listed for sale .. So if you contact them then you may be able to get it ..
However .. Id say 50% (or more) of the people on there are unofficial flippers .. Buying low selling as high as they possibly can .. Which I personally cant stand but thats the nature of the market I guess .. Also about 80% of them are immature little brats that will post up nonsensical comments just because they are bored and will railroad a thread just for the sheer pleasure of pissing off a member they dont know or just dont like .. and they seem to get away with it .. So IMO that site is a gold mine of info and a good place to find hard to find prints but be ready to pay a premium.. Im reverting to being a lurker there .. Its just not worth the hassle of dealing with all of the prepubescent teenage boy mentality ..