I spotted this by chance as it's currently one of the best 4K projectors available in the sub £3k price bracket.
Only became available in the UK a few months ago so I was surprised to see such a big discount already.
With 2700 ANSI lumens it can be used even in a non-light controlled room.
Plus since it's a laser projector the light source is good for 20k hours.
Looks like Amazon have 12 in stock as of posting although you do need to be a prime member to get this price.
Whilst not exactly "cheap" I thought it was still a good deal and hence I wanted to share in case it helped anyone.