The prices are cheaper at the moment due to Coronavirus - but that’s compared to the advance prices. Usually it’s around £30 for Escape, and more depending on which terminal you’re flying from.
We generally use the lounge at Manchester and at the return airport - so we both save ~£6 at MAN, usually around the same on the way back and at ~4 times a year it all adds up!
We get also get discounted lounge access through my partner’s employer, but it’s still cheaper to use the loungekey access!