I don't think you'll regret it - he's got a high enough merchant rating, he wants you to use Paypal, he's got a 7 day return policy, and the town he claims to be from actually exists.
Worst case scenario, most of the fans are in a non-working condition, and you request a refund as that wasn't what was listed for sale (listed as "Used" in Ebay has very specific connotations). Even if he suddenly disappears, Ebay / Paypal will cover you (actually had this happen to me and about 30 other people once - merchant just flat out disappeared, canceled his account, and ran. Got all my money back through Ebay.)
So... if it fills a need, then why not?
Worst case scenario, most of the fans are in a non-working condition, and you request a refund as that wasn't what was listed for sale (listed as "Used" in Ebay has very specific connotations). Even if he suddenly disappears, Ebay / Paypal will cover you (actually had this happen to me and about 30 other people once - merchant just flat out disappeared, canceled his account, and ran. Got all my money back through Ebay.)
So... if it fills a need, then why not?