Used Postage Stamps For Charity

[imd123]

Unfortunately this question doesn't seem to fall into any catagory on here so i'll post it here. For years now I have been donating used postage stamps to charities. I know what they use the funds from these stamps to buy but don't know what they actually do with the stamps.

I think they are sold on by weight but can't see what value they would have. I used to think they would go into packs of stamps for collectors but that doesn't seem likeley now. All I can think is that the actual stamp is made from a paper which is of high value.

Any ideas?

Thanks

[stewey]

Imd, here is some information:

http://www.rnib.org.uk/xpedio/groups/public/do cuments/PublicWebsite/public_frstamps.hcsp

[imd123]

Thanks Stewey

[heathfield]

There was a scam some years ago where crooks were collecting used stamps, removing the postmark ink, and re-using them as new.

[imd123]

Thanks,

There are loads for sale on ebay with no gum. Where do they all come from?