The third scenario is that you buy directly from independent designers. One of my friends, Harry Wicks, is currently studying Graphic Design and works on various deisgn projects in his spare time. He created the two square prints pictured above from photographs I sent over.
Up and coming designers are often looking for experience and many take enquiries for this reason. However, it is important to recognise the hard work put in by these smaller designers and to support them as they grow.
Printing & Framing
When it comes to trading in digital files, printing and framing is obviously not part of the package deal - you have to outsource this yourself. If you're on a budget, you could simply print your designs on your home printer and secure them to your wall with blutack.
Personally, I had my rectangular prints printed by Snapfish and the square ones by Photobox, purely based on price comparison. There are a handful of great UK-based online printing companies out there to choose from.
I then went and picked up some frames from Wilko. I just wanted simple black frames and Wilko do A4 frames for £2 each and square ones for £6; an absolute steal! Put your prints in your frames and bang them into your wall with a nail and hammer (or whatever fixings your landlord/parents/university) will allow.