If you check completed/sold listings you can see the Bob James carp rods go for a max of 50 quid. The Bob James fly rods go for a bit more, about 70 quid.
There is a vintage tackle group on Facebook they regularly have posts from folks selling gear... might be worth looking them up and joining to sell them there
Northey Park doesn't allow dogs apparently, although there are videos with a well known angler with his dog on there - seems it depends who you are. The owner didn't like me pointing that out lol - I didn't make his waiting list 😁