Knitting machines - keep or sell??

I need your advice!!

So I have these knitting machines. Three, to be exact. Brothers KH-860, KH-260 and a KH-830. Complete with their ribbing attachments, little foldy table, some cones of yarn, and some wonderfully 90s pattern books and punch cards. I've had them for a couple of years now, gathering dust under my bed, so the other day I figured I'd just do the sensible thing and list them up on eBay. Because, really, when am I going to have the time to figure out how in the hell to operate them, and who wouldn't want an extra hundred quid or two just before Christmas?

But then I got them out to take some photographs...

Scary looking? Hell yeah. But aren't you now feeling kind of intrigued...? Immediately I Google the models and up come a flurry of YouTube tutorials on how to set them up, cast on, and do all sorts of amazing stuff... It is thanks to YouTube that I learnt to hand knit after all; now the world of machine knitting could become my oyster too! And let's face it, when it comes to hand knitting, I'm more of an instant gratification kind of gal with a penchant for circular needles or DPNs, so how great would it be to be able to think up and whip up, and I mean really whip up, a few cabled jumpers here and there for me and the little man? A great big knitted blanket for f*** sake??? Plan to list on eBay scrapped there and then.

I did think I should probably double check how much they were going for though... £500 each??!! That's potentially £1500 for all three! What do I do guys?? I need your help here. Do I keep them and get all obsessed with this new-to-me craft, or take the money and run? Not sure where I'm running to but you know what I mean. The learning of a new craft is always so deeply exciting... I love that I'm building up a bank of skills and developing my creativity in ways I hadn't planned. And of course, the making and the wearing and the giving of something I've made is also a big motivator! But the time and the money that goes into these hobbies, and those slightly manic nights when you can't get to sleep because you're so excited and inspired and just need to keep on knitting...! Don't I already have enough on my plate?

What do I do? What would you do??