Being a true Scot, and frugal, would you know of a web site or store that might have used kilts and Prince Charlies?
I have not come across used items in the on-line vendors with which I am acquainted. Perhaps an extensive search engine search and e-mail might help. Perhaps you might also a post your request to a newsgroup. A Google http://www.google.com/ search yielded numerous “hits” of people wanting to buy and sell kilts. An alternative may be to rent a Highland outfit at The Scottish Merchant mentioned elsewhere in this FAQ.
