Sounds like a good initiative.
For me, the number one reason that I would abandon a purchase isn’t because of the item page itself, but because of the added fees incurred at the purchase point. It frustrates me that the price that I end up paying isn’t the same as what’s shown on the product. Say I want to buy a $20 track that I added to my cart. I get to the point where I want to pay and I’m faced with a vague “handling fee” and then VAT on top giving me a total of $26.40. A whopping 32% more than I thought I would be paying. (On top of that, isn’t there a Paypal fee if I choose that payment method? Which would make me wonder what the handling fee is all about if Paypal are handling the transaction!)
I think you should advertise the +VAT price on the items and build your handling fee into the item price. This way, there are no nasty surprises at the business end of the customer interaction.