Please make sure that when you're making a "best offer" that you are 100% sure that if it is accepted, you will continue wih the purchase. (Bear in mind that sometimes, it may take up to 48 hours for an offer to be accepted).
If you do not follow through with the purchase, you will receive an "unpaid item strike" from ebay, which will seriously damage your ebay reputation & buying power, and you will be blocked from any further purchases from this ebay shop.
This policy has been adopted, regretfully, due to a recent increase in "non-paying bidders". Nov 2012