Follow up - that's vinyl white , custom size / high performance ( I think everything is custom sized on older homes ) .

I really can't understand what you have gotten a quote on. It looks like it's 2 60x80 Sliding doors. What's 90x78 and 80x78?

Hi

I have 2 60" X 70" sliding bedroom windows and two sliding glass doors in back
one is 90" x 78" # 2 is 80" x 78" white vinyl high performance glass No white trim / grid . Single story stucco / flat ground home. Its all Chinese to me

If those measurements on the doors are correct, then you are being quoted a price on 2 custom doors which typically cost about 50% more for the door. Based on that alone that is a very good price. Additionally those window are likely gong to require tempered glass which which will generally add about $6.00 per square foot to the glass. I'd say that's a very reasonable price.

So far everyone I know has had custom windows " sizes ".
Either all my friends have old odd homes or the custom line is just a marketing scam . Other sources I called seemed to think the price is fare . Thanks

Custom doors and custom windows are 2 different items. Most replacement windows are custom. Most doors are not. In your case the doors are. That's what makes them a higher price.

Sounds high. Get some more quotes.

2 custom sized doors and 2 standard sized doors, all 4 for $5460 installed into stucco and you don't think that's an excellent price? Please tell me where I could get a better deal than that. I have been in the window and door business for over 20 years and I'd like to know where you shop.