As with anything, some companies make better quality items for sale than others.  That's not to say that the cheapest Blu-ray player out there is the worst one, nor does it mean that the most expensive one is the best one.  There are older models, newer models, discontinued models, etc. Doing research is very important.  Read reviews about products you are interested in (there are some decent ones on the Blu-ray players on the FS website). 

Also, if you want to post what brands/models you are interested in, there are many people that can give sound advice before you jump right in and buy something.

Thanks for your question!

JB