Double checked and the HK MP5 has an HK A3 stock, which would ad a couple bucks to the market price, depending on what other options are included vs sold separately, been advise to by a couple local SOT's that around $18K for the MP5 with sear is typical. Of course one could always wait and see if prices pop a few percent later in the year ;-).
Greatly appreciate everyone's help and once get up and around (off a few days following surgery, find typing on a Tablet while laid up not to work as well as the PC ... thus will post for sale later after can look close and snap a few photos, inventory the accessories and upload to a web page).