I have repeatedly searched the net for cheap airport transfers & Great Late Deals (in some way connected to, maybe owned by, travelrepublic.co.uk) have beaten the rest on the last 3 occasions!
Just booked a return Alicante to Benidorm for my folks for £19.01 (£9.33 by 2 plus 2% CC fee) - this is significantly cheaper than resorthoppa at £32.52 (still over £29 after 10% quidco/topcashback if it tracks). The best part is that the transfer is actually provided by... RESORTHOPPA! Yes, a 33% saving over booking direct.
For reference, I searched ShuttleDirect, A2B, holidaytaxi & a few others (all the ones I saw on topcashback) - resorthoppa was the 2nd cheapest!
These are shuttle transfers, which I was worried about, but having used them twice, I don't hesitate to recommend! The best priced taxi was around £80 dearer!