This Thursday, Lidl have their self levelling laser pointer level on sale again. Better than the similar one I bought some time ago as it includes a variable height tripod. Mine came with a less useful shelf clamp - but fits my camera tripod, so one less large thing to store when not in use for me.
It generates a laser cross, nice and bright. One of the best 25 quids worth I have. Brilliant for tiling, or anything else like that.