Selling my like new vortex razor angled 65mm gen1 spotting scope. Comes with box, neoprene cover, phoneskope eye piece, digi scope camera adapter and vortex summit xlt tripod. SOLD
I can't say why he did. I can say it isn't hurting the seller. It gets the seller a bump to the top.
It implies that someone sees value in what he is selling at the price and may lead others to take a closer look when they may glanced past it.
It's implies that someone feels this is a quality product.
Maybe it just feels good, he really would love to have this setup and wants to give it the ol' " Damn son, wish I had the money to buy this fine package of hunting optical tools from you good sir, but alas I simply do not have enough beaver pelts to make a fair trade at this time. Good day to you sir, good day." Potentially helping the seller feel like he is offering something of value at a reasonable price.
Or some less uptight olden days version of that anyways...