As I posted in another question earlier....I worked in a quilt shop/sewing machine dealer store for years. Some manufacturers DO NOT allow regular current dealer models to be sold at BIG outlets or on the internet on auctions, etc. They have certain machines for these outlets. Or they sell out dated models (that didn't sell or have been upgraded to better model). Joann's, Hancocks, Wally World cannot answer any questions about the machines that they sell, cannot even demonstrate or teach you how to use it. You cannot take it back to that store for warranty......what do you do??
Definitely.....only go to a Dealer! They are Mom & Pop run stores and that is what America and free enterprise is based on......so support your local dealer! They can give you free lessons on your machine, parts, service, warranty......and usually some "free" type of goodies when you buy a machine from them. Most dealers carry low-end inexpensive machines too!
Remember.....the old adage....you get what you pay for....money-wise.