Advice on selling the wife’s Rolex (yes, she knows!)

My wife has a bi-metal lady datejust she bought in 1999 – bi-metal case & jubilee bracelet & (I think) champagne diamond dial (I could be wrong about the colour). She hasn’t worn it for (probably) 15 years, and has decided to sell it and gift the cash to daughter number 1, who is saving hard for a house deposit. Because she thinks I know everything about watches, she’s asked me to advise her on where to sell / what she should anticipate getting for it. The problem is that I know very little about Rolex, and what I do know tends to be on the steel sports models. So here I am, with one of those "best place to sell" & "what’s it worth" threads. Any help appreciated!

Some info that will probably be pertinent

1) She purchased it new in 1999 from a jeweller in Warrington. The sales receipt is included (hand written for a "Lds Rolex B/watch" at £3520)
2) I believe it is a 179173 (the punched guarantee papers have a sticker on the front with "79173" on them
3) She has the original box, hangtag, Swiss Chronometer tag, red Rolex wallet with guarantee book & calendar (for years 2000 & 2001)
4) the watch has not been serviced & so a service will need to be factored in
5) cosmetic condition – my wife isn’t as precious with her watches as I am, and looking at it under a lupe I can see lots of dings / scratches. It has never been re-finished, so I would anticipate a service and case / bracelet finish at Rolex would bring it back to pristine.

It will need a service / case finish. Does anyone know (roughly) what Rolex would charge for that on this watch?

I’m unsure whether the best course of action would simply to sell it to the trade as it is, rather than bother getting it serviced and then trying to realise a higher price to cover the cost of the service.

So any suggestions – on both where to sell, but also whether a service before hand is a good idea.

Sorry to be so vague, but as I said in the opening paragraph, these are really not my thing! :apologetic: