We have had a spate of these questions about buying micro-businesses lately and TBH,
@Clinton has outlined the dilemma - due diligence know-how is expensive and totally out of the question for buying small retail units, or on-line shops selling under £1m p.a.
Even first class due diligence is no guarantee that something vital will be missed. I guy I know sold his Manchester electronics company for a few million to a US international and they had a whole team of MBAs crawling all over everything - but they still missed the fact that all the intellectual property (mostly patents and designs) were either on a limited lease from a friend, or had been parked in another company and had less than five years to run, before the contracts ran out.
So as Cinton says - read those contracts and talk to everybody in and around the business about what could really be going on!
One thing I can say is that your figures seem strange -
net profit of over 30% is massive, yet this goldmine is being sold for just two years of net profit! Why are the owners selling a goldmine? Something somewhere is not being included in those figures! Something is being hidden - your job is to find whatever it is that they are hiding. Either that, or the meaning of the words 'net profit' is being bent out of all recognition!
But then maybe this is the chance of a life time, but you know what they say - if it looks too good to be true . . .
Tip 1: When I look at a company, the very first thing I do is
look at the people involved, check their trading history, look at what other companies they own or have owned in the past and check their credit history. I am looking for the typical warning signs such as a string of failed companies, delinquent liquidations, any sign of them being dodgy or trying to hide who they are and what they are really up to. If anything looks even slightly fishy, I don't want to deal with them.
Tip 2: It is the dream of every owner of an SME to build up a company to a certain size and then inflate the value by fair means or foul and sell the thing off to the first poor sap that comes along!