Eastern UK.
I could just buy one from near here but I don't have the money.
The base cost (i.e. the amount you pay to the vendor) will be lower. Essentially you have the base US price ($1800 for the base 15'') instead of the UK price that includes UK VAT and some 10%-20% premium that Apple puts on the prices abroad.
To the base US price you have to add:
- shipping cost (depends on the vendor)
- UK VAT (unless you know a smart way how to avoid paying it - usually you will have to pay it when the product is delivered, and the postal service will collect the money)
- postal service fee to collect the VAT
- other possible fees for importing electronics
- foreign transaction fee on your credit card (1%-3% I would guess)
- a small loss on the exchange rate
Then, you will a) have to wait longer for the product, and b) have a very complicated return process in case there is a problem with the product.
Potential savings:
UK price: 1549 pounds = $2450
US price: $1800
US price + tax (20%) + cc fee(2%) + $50 misc fees: $2250
Not sure if that's worth the hassle.