Chinese 60W machines on Ebay - which to select?

Hello all,
I’m researching my first purchase and will likely go with the common 60W Chinese machine on Ebay. Questions I have:
Many of the Ebay sellers seem to be the same company (based on ad appearance and location), but the pricing is slightly different. I live in Oregon so I’m looking for shipment from California, most likely. Ebay sellers include “seriouswholesaler”, “wowfreeshipping1”, “premiumautopart” and “acautoparts04”. Their ebay pages and advertisements look almost identical. Is there any preference beyond price??
Are there any differences between the different colored machines? Most common is red/black, but I’ve also seen yellow/black and blue models.
A blue machine advertised to be “new for 2020” caught my eye. They are advertising new “upgrades” including a larger brown-tinted acrylic window on the hood, a dual platform (beehive and aluminum knife); built-in air pump already installed, and an aluminum vent duct (instead of plastic). Are these upgrades worth selecting this one? Price is in line with the others at $1949.
The price of all these range from $1910 to $2020. One unit for $2005 includes a rotary axis, and another for $2020 includes Lightburn. I figure in any case, I can buy Lightburn for $80. I would not use the rotary axis right away, but might be nice to have?
Thanks in advance for any advice!

Orionmotortech which is also known as Preenex is very reputable. I own one of their 60 watts and I am very happy with the laser and tech support.

I also use Preenex and never had problems. at the expense of sellers, contact to customer service or use ebay phone number