NCT Nearly New Sale. Need some advice. For how much should I sell these items?

[ekra]

FP ride on/walk-along car

cot - probably retailed for £100 but we bought it in a secondhand shop for £40, 4 years ago.

Wooden push along with wooden blocks inside
Travel cot - very good condition

Bike trailer - cost £100 new. Takes 2 children. About 18 months old.

Karrimor baby back carrier - this is actually my parents and has been used a handful of times so is in excellent condition. They don't go for much on ebay though.

I have no clue how to price these items as I haven't had a look at what others sell these for at the NNS.

Please advice if you can. Thanks

Cot £30, wooden push along £8 (if in VGC), Travel cot £20 a bit more if it has wheels or basinette or something, bike trailer £50 (could be wrong season), Back pack £20-£30 depending on which model it is/how much new go for around half price (again could be wrong season)

Also take into account how much you want to sell it after lugging it there rather than taking it back home!!! Ask if you can help on the day and then you can always reduce the prices if you need to.