Hi, you have been busy....I assume that these are the sellers pictures.
The first sword , the Dha, should have a nice forged blade, with very good balance.... do you know how thick the blade is? If it is too thin ...it could be a tourist piece.
The second a Takouba, usually associated with the Toureg but in truth are 'adopted' by many Tribes/groups throughout the Region.....worth doing a search on the Forum and here
http://www.vikingsword.com/ethsword/takouba/index.html
The third is from the Congo and is widespread, common to the Western Mongo: Kundu, Konda, Ntomba, and Kote Tribes. The desgns on the blade may help to identify the tribe or area.
I expect many others will add their comments once you receive them and post your own pictures and description.
All the best
David