Ooh! I need some of those.
When I first set up my workshop it was with a view to making picture frames and became somewhat obsessed with getting things perfectly square. It wasn't a birthday or special occasion (not mine anyway) but I was gifted some cash with an instruction to 'buy something nice with it!' So I bought one of
these. I'd have needed a lottery win of multi-week rollover magnitude to have ever considered shelling out this much money for a single tool. Particularly when I was setting up the workshop it proved invaluable, especially when breaking down larger sheets for all the cabinets and workstations I was building. I don't use it anywhere near as often but because it was a gift and it is great to have when needed I know I'll never part with it and just glimpsing it reminds me of a very special person and a lovely day.