Help me pricing a 1970 Les Paul Custom for a friend

Hi , I have a question for all the Gibson users here, a close friend is selling this beauty since is he too disabled to carry the beast now. In the process of selling the LP we wonder how worth is it ?

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Here is a set of pics

The serial reads : 73 53 03 or 73 53 08 ( barely readable ) with " MADE IN USA" . It's in really good condition except a few back belt scratches and a spot in the varnish.

The pots show a "70" ( year of building ) the 2 caps are long black type. Everything is stock (engraved PAFs ... ) but I'll change the tuners since I fount the excat same model ( Kluson waflebacks ) .

My own reseaches led me to identifying this LP to be crafted in 1970 , but I'm not sure.

The sound is really vintage , very honky & growling and the tone is really interesting when lowering vol & pots tone it leads to telecaster/ SC territory , a tone I wouldn't expect from this LP ...

Any info on the year , building site ( Norlin ?) & price is welcome.

WOW ! that's lot's of money , thx for the infos.

I'll provide some samples / songs done with the beast sooner or later for the one interested in the tone, it turns out pretty good sounding on recordings.

Quote from Djuhntt

fret-end binding nibs

Yes original fret work & nibs !!!

I took the time to record the beast but it's a fully processed tone you'll hear there, not the raw one , this LP was difficult to match to the proper amp but I've now the right rigs for it.

Here is the link to the song

I'll get some raw samples soon ...