If it's polycarbonate, it's a plain ol' MacBook, not a Pro. js.
As far as what works best on which computer, there's no definitive answer. I've seen people say they need a dedicated graphics card for CAD, and I've seen people say it works fine on the Air. You'll have to post more info about the computers!
Depends on your need and wants.
MBA has built in RAM and SSD that can't be upgraded so you're stuck with what you get.
MB can be upgraded in both memory and hard drive.
Also, since the MB Air has no optical drive, you must purchase one if you need it.
Since you'll be using it for some CAD and videos, stick with the MB.
PS. Your MB is not a Pro.
ic, so the sellor proably typed it in by accident or something
for the macbook, the listed spec are:
and the air just says model A1304
(can someone please confirm what year model A1304 is? my research says it's 2009, but the sellor keeps saying it's 2010)
i don't really like the fact that the macbook is polycarbonate, but it's spec are better than the air...
and for the SD card reader, i'm looking at the tech spec from apple's if it's a 2010 model, it has the reader, but if it's 2009, then it doesn't
If you don't like the White Macbook, and you're not in such a rush to get one. Look around for a Uni that might be $100 to $200 more that has more RAM and larger hard drive than the White MB you're looking at.
Nothing really much wrong with the white MB. Just a little fragile around the corners. Other than that, it's still a fine notebook.
The only bad thing about the MB is that the casing tends to crack and splinter under regular usage, so make sure this one is in good condition before you commit to anything! But yeah I would recommend the MB over the MBA just because you can replace and upgrade parts, which is something you'll definitely have to do since these computers are both old models.
Have a look at the white one to see what condition it's in.
If it's in mint condition, might be hard to haggle with the seller.
But if there are a couple of imperfections, then you might have bargaining power.
In my case, I always go and see the seller with cash on hand and offer him a little less than his asking price.
Once people see's the cash and know's you're serious, he'll usually accept what you offer him as long as it's not too far off than his asking price. Unless it's a must sell quick then you have bargaining power.