None of these are rare or sought after, a late Bullied 'spam can' pacific is the top money can be upwards of £500 and £280 for something like a Royal Scot.
R type tanks and N2's are very common, the 2-6-4 is also a very common loco so £200 the lot is a good price if they run OK, helps to have original boxes etc of course
As to Wrenn, tough, long lasting, weighty, stay on the track, pull huge loads, indestructible, strong motors, well engineered but starting to show they are old models, I have quite a few but run them less and less as the modern ones take over. Perhaps yopu should run them instead and have some fun with them, you never know you might enjoy model railways!