Hello and welcome, Not an easy task, a decent bandsaw for under£220.
Auctions of fleabay are you re best bet, You'll probably be tempted to buy some old rubbish,
Some older machines are very good and still can do the business, If you're experienced, you'll know what to look out for.
Tyres on the wheels need checking for wear, and the bearings, blade guides and thrust wheels too.
Does Tensioning work, is the table flat and fence square and working etc, etc.
If you aren't aware of any of these things,It may pay you to save for a nice shiny Record 12" or 14", these are favoured recently by members for Record's long guarantee, customer service and they say a very nice bit of kit!
There are other makes but Record seem very reliable.
HTH Regards Rodders
PS,Having seen where you live, you may find it easier to find a bandsaw as mainly because of silly transport costs,
machinery tends to realise a lower price.
Just like the #9 'bus, One will be along soon, if not two!