Amazon has the TOMTOP 24″ (60cm) 5-in-1 Collapsible Photo Reflector for only $7.49. Regular price is $19.99.
This reflector comes with five different surfaces: silver, gold, white, black, and a translucent surface that can be used as a diffuser. The 24″ diameter folds down to 9″ diameter, and comes with a carrying case. This item averages a 4.5 star review on Amazon, so this is great value!
24 inches though.. how useful can this be? Don’t buy this – IMO.
It might be ok for a close-cropped portrait shot but otherwise, I agree – I have a 32″ version and that sometimes feels small for a full-body portrait.