I purchased this domain in 1999 (15 years ago) for my home business, but am now selling develo.com for the following price as of September 6th, 2015:
August 23rd, 2015
In case you are wondering how I came to this valuation, it is the outstanding balance on my home mortgage.
The price will continue to drop as I pay it off.
Please refer to this domain's whois information for contact info if you are interested in buying it.