The “tuned in” $99 Kickstarter printer (see this great review of the Tiko) is likely to be able to print quite good quality and a $1000 printer is likely to be able to achieve very similar quality to a $5000 printer (see our review of the Cubicon Single).
This is similar to a $30 Walmart paper printer – it can probably print close to the quality of a big $20,000 office Xerox printer.
The difference is durability. A $99 3D printer is unlikely to be suitable to the rigors of the school environment.
That being said, price does not equal performance. We have seen $1500 printers perform much better and be much more reliable and durable than $5000 printers.