Every time I used my Vision 4 I was getting harangued to "upgrade" to 12.2.0 from 13.2.0, so finally did it after the Vision locked up twice today. 12.2.0 is a little snappier.

If anyone is interested in a Vision 4 in the U.S., a seller has two of them up for sale on eBay. Both supposedly in good shape — I've never dealt with this seller so I can't vouch for him/her or them. One is selling for under $50 (including postage), the other is selling for under $60 (includes postage).

Under $50. (now $43.61)

https://www.ebay.com/itm/Tolino-Vision-4-HD-Tablet-Very-Good-Used-Working-Condition-Black-Y118-/143516510193?hash=item216a4027f1

Under $60. (now $53.83)

https://www.ebay.com/itm/Tolino-Vision-4-HD-Tablet-Very-Good-Used-Working-Condition-Black-Y076-/124064212955?hash=item1ce2cda7db

They both say "Very Good Condition" so I'm not sure why there is a difference in price.