Most of my sales are $8 expired domains sold only to end users generally in the range of 1-10k with a few oddballs below that range and a few well above that range. So would I flinch at a $60 price tag over $50=No as I wouldn't be buying it if I didn't think I can get at least $750-$1000 for it from an end user so only a $10 difference in profit margin.
Guessing your more of a flipper based on your signature links where a few bucks might make a difference as your profit margin is small. Not a model I've ever been into as it equals a job selling mass domains for small margins or a time investment. Buying the best domains you can find, enabling sales pages on them, entering them into distribution channels and having patience equals less sales, less work and still higher ROI. If a seller was firm on $60 I'd pay it if I thought the domain was worth it if not move on as you have 25 posts in this thread over $10. My time to post 25 posts is worth more than $10. So the question for me is always "What would an end user pay for this" and not a firm "I'm never gonna pay asking price" as I've been known to overpay people for domains or just round up.
Domainer to domainer sales maybe. I use my own sales pages so I build names, company names, email addresses, phone numbers, ip address and this month is the strongest of 2017 for me so far on end user sales and inquiries. I've added 5 end user leads to my database in the last 2-3 days on 4 of my domains. Will those sales pan out not sure yet but the end user database just continues to build month after month for 14 years now and the end user offers I see don't say domains are dying just gotta get into the right market which isn't $49 domainer sales where $10 matters.