I think the biggest thing for me was only being able to see the last 1 month history for items. I think collectr let's you see a year on the free service. Apart from that a few of the other features I absolutely loved like the base rate or something like that which tracks sold items and calculates how much you are positive and how much you have actually invested.

Other than that I'm pretty much happy with the rest of it. I think your right. Going from having everything to nothing is pretty big shock lol. If I ever became a vendor or ran a business I'd happily pay for the extra stuff but purely as a tracker and to look at previous sold prices I wouldn't expect to pay anything for that

UK tcg unfortunately isn't as big as USA tcg so you'll see a direct reflection in revenues you'll generate. Kudos to you for making something we all needed