Only I am afraid they will be the price of gold when delivered from USA to Bulgaria
Shipping via First Class mail for a small package is usually less than $6 to most places but can take 3 weeks or so to arrive. Shipping by Priority Mail for a small package costs about $15 and arrives in 10 days or so. I would not want to order one bit at a time and have them shipped but when ordering several at a time the shipping rate is not bad.