Greetings all...
1st up thanks for the advice on TI's mass cleaning to removing oxidation. Worked like a charm.

now question at hand.
1) I've seen these on ebay. And sellers put a price of 600 usd on them. What would be an ideal price for these? Coming from a 3rd person who has dealt in buyin and using these razors. I did some scooping around and 350-400 range is what these razors fall under?

Both razors are 7/8 and 13/16 respectively. I do not know much about FILARMONICA #13 but what i've seen is they are super rare and 13-14 are most sought after.

Need advice on extending an offer to prospect seller.
Thanks
Nico.