As with all things like that, they seem dear. And yes they are.

But I've had my MIG for maybe 30 years ? It could probably do with replacement, but it works fine for about 90% of what I need...and it seemed expensive at around £500 when I bought it back in the early 90's

I bought the TIG as I say around 12-13 years ago, for I think similar money as today's prices. It seemed dear back then...it probably was. But as a long term investment..no big deal.

And BOC now offer sensible hobby/Volkzone deals where the gas is actually sensibly priced compared to years gone by. Although you guys would have far more choice of suppliers in England, BOC more or less had a monopoly for years here. Paying BOC rental for years and for gas....was not a good investment, but ha no choice. They were a rip off. Bottle rental and gas is about half the price it was years ago.

But I would go for something like that, as you can go through a lot of gas especially if you're learning and practising. The cheaper Hobbyweld type deals others offer...bottles are cheaper, but hold much much less gas for the money, so represent very bad value if using a lot.