Try calling places like Walmart,
discount stores to see if they have it and what the price is.
Sometimes places like TJMaxx (discount department stores)
get a limited number of items like this so yeah,
best bet is call around using your yellow pages or business pages.
We have a game store here in Nebraska,
that sells gently used game items.
Check for someplace like that locally.
Search online putting your city & state to get local results for a game store like that.
Sony 1GB Memory Stick Pro Duo Mark 2,
2-Pack $29.00 - Walmart (searched for you