Personally I would want more. 350 Euros after commission barely covers cumulative reg fees from March 2005. There are 2 developed sites with inferior derivative domains, LocationPro.ca and LocationPro.net, that underlines the excellent association between Location and Pro. I had a $1,500 offer for Relocation.pro on Sedo in April 2008 and didn't accept.
Here are some .pro drop prices on SnapNames in the last 3-4 weeks; Politics.Pro $600 (I bought it), Data.Pro $700 (another NP member bought it) and Chess.Pro $600 (sold this Thursday, not sure who bought it yet). You would expect a motivated buyer to pay more on Sedo than a .pro enthusiast on SnapNames. Also, look at the registration years of Chess.pro and Politics.pro, 2006 and 2007, Location.pro is 2005.
Location.pro would be a perfect name for a company selling office space or for any professional who moves around and works "on location", My most prized .pro domains are anything to do with professional context, for example Office.pro, Studio.pro, Mobile.pro, Salon.pro.
Location.pro could be used as a property site with the Pro doubling up as property, implying that you are a pro at finding people the right location to live. It could be used by a property consultant who looks for office locations for blue chip companies, it could be used be a sat nav company, a personal security company tracking cars or people. It's a very versatile brandable domain, neater, purer, better fitting with the extension and more impressive than most of the gubbins that gets touted on NamePros.
Location.pro is a $5,000 domain to the right buyer, I'm sure of it. Keep this one long term until you find a motivated buyer. For now send a reply to the bidder on Sedo pointing out some of the genuine reported .pro sales like Chef.pro, Book.pro, Guide.pro, Freelance.pro with prices and dates. Have a look on dnsaleprice.com. Say .pro registrations have risen approx sixfold in the last year and Location is an excellent fit with .pro, a valuable, commercial, versatile keyword, and was regged over 4 years ago in the first week Encirca's Pro Forwarding service was launched. If you want to counter, I would counter at 5,000 Euros in the bid thread but then tell them in the text you send that you would accept a counter offer of 3,500 Euros or you would send it to auction for 2,750 Euros. Keep the gap between Buy Now and send to auction relatively modest as an incentive to skip the auction process, that way if the bidder is a motivated buyer, they will pay the extra to avoid hassle.
My key domain maxim is sell your best domains last. I think Location.pro is your best .pro so don't give it up without a decent offer. You did well to pick it up, so let it roll a couple of years and see what happens.
My view is that continued losses will force RegistryPro to become ever more commercial in their approach to .pro, they are beginning to show green shoots of that by applying to ICANN to amend their contract so they can issue 1, 2 & 3 character .pros and sponsoring the ICANN June 09 International Meeting in Sydney. Hopefully, by rebuilding trust and credibility with ICANN they will be able to get the residual restrictions removed which will give .pro a big shot in the arm with registrars and end users.
.pro is far more brandable, credible and impressive than extensions like .tel, .asia, and .mobi that have been brilliantly promoted by their registries so there is room for a little out performance in the next couple of years over and above the recent strong rise in registrations.
Holding .pros is frustrating because RegistryPro is so ineffective but the best strategy is to drop your weaker .pros and look to add more quality on the drop at SnapNames, selling your best .pros at firesale prices and giving Sedo a 30% commission in the process doesn't make sense.