[ddeck]

I'd also recommend this approach. FX is a cash cow business for banks. Money changing is one thing, where the business has cash management risks and cost, but FX on a wire transfer is close to 100% profit for the institution. They trade at mid and keep that 4%.

As the parent poster commented, Interactive Brokers will give you rates close enough to mid as to not matter (e.g. the current rate to buy/sell EUR with USD is 1.2313/1.2312, plus a few dollars commission).