Yes, one can make money from a drop ship site. Many variables to consider.
Some questions I would ask :
What exactly is included in the website
The domain name?
the actual website pages
the website support software
the contact data bsse of vendors
the contact database past costomers
a non compete clause
>took the website off line
Never a good sign. Loss of search engine placement as well as repeat customers. Think .... how much is a business worth once it is closed. Blue sky deminishes
>over $100K in sales some months ....I do not know what profit the site
Due diligence will give you these figures. If you are serious about purchasing the business, you will want to see profit/loss statements as well as tax returns.
Web site statistics - does it support the plausibility of the sales figures stated
List of current suppliers - contact them to be sure you can continue to sell their good and with the same / better terms.
Many more things to consider when purchasing any business