We are currently accepting ads at Papercraft Paradise: 
728x90 leaderboard for $80 a month, $300 for 6 months or $500 per year
 125x125 banners for $20/month, $100 for 6 months or &160 per year
125x30 for $5/month, $40 for 6 months or $65 per year

Majority of the visitors are from the US and Europe.
Contact me at michaeljames01@gmail.com for site stats, ad prices and other details.
Only Paypal is accepted.