I regularly look through the clearance lines on CPC Farnell (a UK subsidiary of Farnell/Avnet) and currently they have a Tenma 30v/3A PSU for £51.84 (incl. tax and shipping)....not bad if someone is looking for a reasonable entry level PSU.
See https://cpc.farnell.com/tenma/72-2705/power-supply-0-30v-programmable/dp/IN0763769
Rod