I've been making planes professionally since 2007. I've made a lot of planes. Some of these tools are now showing up on the second hand market. Various woodworking forums have marketplace locations and of course there is Ebay.
If you run across one of these ads and are considering making a purchase there are some things you need to know.
(1) All the planes sold as completed planes came with a document of provenance. If the seller doesn't offer to include the document then you need to ask more questions as to the origin of the plane. Why? See number (2) below.
(2) In the early years of plane making I also sold kits so that others could enjoy the plane making experience as well. Recently one of these planes was offered on Ebay. The title of the ad did not make reference to it being a plane completed from a kit. One line in the description did in fact reveal this fact. For this reason you could well be buying a plane made by a first time plane maker. Needless to say there will be considerable differences between a plane made by a person that has completed hundreds of planes and one made by a first time plane maker. Fortunately the eventual buyer of this plane asked all the right questions and was fully aware of what they were buying.
(3) Kit planes do not have the"Brese" logo stamped or engraved into the front of the lever cap. If the lever cap lacks this logo it's a kit plane. If the logo is present send me a picture and I'll verify that it is original.
Below is a picture of two 650-55 J planes I completed a couple years ago.
Recently another similar plane has been offered for sale. But not made by me. Look familiar? I just wanted to make it clear the plane pictured below was not made at Brese Plane or by anyone affiliated with Brese Plane.
I was reminded recently that imitation is a sincere form of flattery.
"Beware the sheep that wants to save you from the Wolf"