i can only answer for myself, andré. but i don't see a reason for a beat like that and the advantages it offers over a good 300W step-down transformer. i've gathered A LOT OF transformers over the last couple of years on ebay (must be around 20) and i never paid more than 25 euros for one, most of the time much less. they are of great quality, well built and can be easily put inside the cabs, so no need of placing them outside. but that's just my 2 cents and the reason why i'm not jumping on your offer. nevertheless, it's always a great effort when someone organizes a group buy for the community, so i wish you good luck for this!!!