Here are some Canadian, Spanish and US stamps. Does anyone of you have an idea how much they could be worth? Thanks in advance.
Depends - in some cases, it would be a watermark or perforation size that would determine value. Nothing appears to jump out that would catalog over $10; take ~20% of that number for what it might cost you to actually buy a replacement or might get offered from a collector (and less for what a stamp dealer might offer).
