Adult Fixie-skidders of LEGO

Ah, that’s all pretty solid advice. I’ll have a cursory look on gumtree etc - but is just struck me that you’re likely going to have missing bits and headaches.

Might be one of those things that requires an amount of scoping out before buying if I want it to be affordable. Gah, who wants to wait!

LEGO is really not the best bet if you're looking for something relatively cheap, so definitely scoping out required, and being clear about what you want--chasing up childhood nostalgia, using it as a way of satisfying your model-building instinct, collecting in anticipation of your little one being old enough for it (not recommended before the age of 4, stick with DUPLO until then, as children just destroy LEGO before that age, and are obviously at risk of swallowing small bits), etc., but it certainly rewards a longer-term commitment.

If you want to get more into it, have a look at YouTube videos. I like JANGBRICKS for reviews (his review channel is now called Jang's Based Lego Reviews, a name I don't quite understand). If you're interested in any particular set, use the five-digit number to search for information. I like looking at inventories on BrickSet, although many people prefer Bricklink, and BrickOwl is also good. Promobricks.de has developed a reputation as the site with the breaking news, although it's in German. One of the first types of videos that I watched were ones from LEGO conventions where people exhibit huge and/or wacky things.

It may take you some time to find out if you're interested in any particular theme, if you don't have a favourite childhood theme or themes, or what kind of bricks you need, so it's worth not rushing the buying.

Have fun!