Stay away from the Chinese lasers for now. Most all reports say that may are not operable out of the box. Some have broken glass laser tubes from poor packing and some guys are even ordering extra tubes with the purchase in case. Most of the good tubes last a fraction of the hours that US laser do. Another reason some order extra tubes.
There will probably be a time when they are safe to buy, buy NOT NOW. There is a long post on cnczone site for hobby cnc guys. There are a bunch of horror stories on there and a couple of guys that have never got their machines running. Of course a couple of guys are doing okay, but it took them months when they have trouble. Software and drivers can also be a problem.
I paid $9,000 a couple of years ago for a rebuilt machine with rotary attachment. You don't need the rotary for lines of text, but I use mine to add art work from the lower barrel to the top. I've also done a couple on a white synthetic so that it looks like scrimshaw. I bought mine from usedlasers.com in Wisc. A great family business, great people.