I found this on ebay and thought it might be of interest to someone who wants to take a risk.
https://www.ebay.co.uk/i/223546188190?ul_noapp=true(Its a relisted item, as it didn't sell at the asking bid of £36.99).
I did contact the seller and asked if it was working and whether it could be packed for courier collection.
I got an answer saying he would plug it in and check (haven't heard back yet).
He did say it could be packed.
I checked on Pfaff's website and the instruction book can be downloaded for free.
I have no connection with the seller or the item. I just thought it might be of interest to someone who wants an overlocker without making a big investment.
(Any potential buyer should make their own enquiries directly with the seller.)