Submitting an offer, use the purchase agreement?

[Patrick Ford]

My wife and I have found a lot we would like to purchase and build on. I found it on Zillow and attempted to get some guidance from a realtor in the area. The experience was not great, i was doing all of the leg work and what leg work the realtor did yielded incorrect info (uncovered by the research I did). That’s neither here nor there; where we are now is we are ready to make an offer. I have a purchase agreement that I paid an attorney to draft for a very reasonable price and it provides the protection I am seeking in this deal. 

My questio is this; should I submit the purchase agreement as is to the selling agent as is or should I send a more informal summarized offer to start?  I was considering submitting the PA with a cover letter introducing my family.  Deals I’ve done in the past have always been direct with the seller so I didn’t have to go through an agent. 

Any suggestions?