We have two of these very good condition Chicco GoPlus Isofix backless boosters to sell.
They are both in excellent condition with no significant marks, stains etc as we only bought them about 6 months or so before our son no longer needed a car seat.
Very easy to click solidly into isofix fittings, and release.
Blurb as follows:
"Chicco GoFit Plus Car Booster, 22 – 36 kg (Car Seat Group 3), Car Booster for Children from 7 Up to 12 Years, with Isofix System, Easy to Install and Release, with Comfortable Armrests"
£25 each or both for £40.