General Method Description

Teleport tablets ("teletabs") are always in demand because of their convenience. They are easy to make, yield a decent profit and also provide good Magic XP!

For maximum efficiency you should have your own house containing a study near your entry garden equipped with an eagle, teak eagle or mahogany eagle lectern. I recommend putting this off a quest hall containing a mounted amulet of glory, or a portal room, for teleporting. Use a spirit terrorbird, or a bull ant if you don't have level 52 Summoning. Note that using a house servant to unnote soft clay is both slower and more expensive than just banking regularly.

If you can't meet the Construction requirements you can use someone else's house. This is unreliable (finding one is often a hassle) and also slows you down as you can't teleport directly into the house. For this reason my methods assume you have the Construction level to make the room and lectern you need yourself.

Note that there's no speed advantage to higher levels here, except for the benefits of increased inventory capacity you gain from better beasts of burden. This is one place a war tortoise is worth using, and a pack yak (level 96 Summoning) is even better.

Finally, if you ever see dust runes cheaper than air runes -- which was the case when I first wrote up this method -- remember that you can use them instead.