There is several legal hurdles with selling firearms via a online forum. I am well versed having being a firearms dealer in the past.
atf/batf nightmare in the advent a issue arrives ...and it will , we have had issues with items as small as $9 , more issues would arrive with the larger tempting for scammer items
One has only to read the headlines today and see all the whacked mass shootings involving individuals who utilized neferious loopholes to access weapons.
1) Illegal aliens
2) convicted felons
3).individuals clinically diagnosed with severe mental issues that prohibit themselves from being anywhere near weapons.
All these people can stray onto any one of the thousands of hunting forums and trick some unknowing member
The other aspect is the unwitting individuals who unbeknownst to them sold those said individuals, without full legal compliance ....those firearms., and now thier life is a nightmare -
So......no guns guys ...I would like to....but due to politics and the reality of the times......no firearms transactions , not here at least .....now we all see the threads about "Greenleaf 870 on gunbroker " hey that's cool , gunbroker is fully set up for that