Dev willing to build trademe replacement!

Hey everyone, I'm a web dev with 15 years experience, and after seeing complaints at least once a week about trademe, I have three questions:

A) Would you like to see something like the trademe of old return as a competitor, and would you support it?

B) How much would you expect to pay given the current economic climate?

C) Are there any notable features you would like to see implemented?

I would initially focus on just having a buy sell style marketplace, then if the audience called for it, i'd look at other verticals like vehicles, etc.

Depending on the number of responses and what they are, i will consider sinking some serious time and resources into building something. Just keep in mind im a solo web dev, if others want to jump onboard im ears!

This is just me asking a question and willing to take action depending on what others want.

Cheers and happy new year!

EDIT: Since a few people have messaged me and a bit of a selfless plug. If anyone needs a website or honestly just wants some advice around what they're doing, feel free to flick me a message.