I purchased this domain in 1999 (17 years ago) for my home business, but am now selling develo.com for the following price as of January 31st, 2016:

$62,646.58 USD

Previous Prices

January 31st, 2016$62,646.58 USD
December 31st, 2015$63,018.58 USD
November 23rd, 2015$63,329.51 USD
October 25th, 2015$63,669.28 USD
September 23rd, 2015$64,007.36 USD
August 23rd, 2015$64,345.44 USD

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.