I started getting hit by this a month or two back... not really happy about paying sales tax on an old/used toy, but eBay still remains the best option for finding and buying pieces missing from the collection. Same with antique shops, they used to always cut you a deal on price or not charge tax if you paid cash, but not anymore... I now use a credit card 99% of the time in antique shops so I can get 2-3% back.