The Bf109G series, or "Gustav", was introduced in mid-1942; its initial variants (G-1 through G-4) differed only in minor details from the Bf 109F, most notably in being powered by the more powerful 1475 PS DB 605 engine. Odd numbered variants were built with a pressurised cockpit and GM-1 boost as high altitude fighters, while even numbered variants were non-pressurized air superiority fighters and fighter bombers. Long-range photo-reconnaissance variants also existed. The later G series (G-5 through G-14) was produced in a multitude of variants. By early 1944 tactical requirements resulted in the addition of MW-50 water injection boost and high performance superchargers, boosting engine output to 1,800-2,000 PS. 
Hi,
I ship within the EU. It is impossible to list all the costs for the different countries. 
If its is less than the 15€ that I mentioned, I will refund the difference. If it is more, bad luck for me.
Mind that these costs are without track and trace. If you want that, I will have to charge you more. No problem if you then decide not to buy it. I will cancel the transaction.
Buyers outside the EU, please contact me first.
I had a small business with perfect score/feedback but I retired from that.
Now I just buy and sell as a private person.