For what you have to spend it is not worth it, I have 2 vintage amps I got from eBay, but I had mates in the US who bid for them and then sent them on or waited for me to get there to pick up. But then these are a vintage 1953 5 watt
And a 60s Lafayette
But these are little, unusual amps, the Lafayette arrived with a broken board courtesy of the postal service, so all in all if its not super rare it is probably not worth it at the moment, and I bought back a Blues Junior this year from my trip. Although the BJ was less than half price (but then the $ was 84 cents american, plus mates rates from a dealer in Nashville). My 2 cents
The step down transformer isn't a big deal, I think I got mine from DS for about $85,
Edit: Oops forgot, the BJ cost US$200 to ship back from Nashville, so if it wasn't for the strong dollar thats a big cost to cover.