The huge increase in postal costs a couple of years ago meant that it was no longer economic to provide a postal service for the large plans and drawings that had been a feature of the Sales List. I don't think everyone is aware that it is still possible to acquire them, though.
Take D7 as an example. This was a drawing of Cromer High Loco Shed. I had the original scanned by my local printers, and it is now available in the form of a file on a CD. It is called D07.CD. You do not have to have a computer to benefit from this. You can still order the CD from the Sales List and send a cheque if you wish. When it arrives, take it to a printer or copy shop near where you live: they can do you a full-size print of the drawing from it.
If you do have a computer, inevitably there are extra benefits. As well as the big printer's file, there is a much smaller one you can use for on-screen browsing, zooming in on a part of the drawing to see the detail. You could print the drawing out on a sheet of A4 paper if you wished (by choosing 'fit to printable area'), but that is likely to be too small to be of much value.
If all you want is the on-screen browsing and do not intend to get a full-size print done, the cheapest option is to download just that browsing file from the Files Emporium.
The choices for D7 are shown below. To find a different one, put its number into the Emporium search box (just 'D1', or whatever) and you'll get it.
{mijoshop id=708}{mijoshop id=697}