Hey, Maurice.
INFI is, in my opinion, the best tough-use steel in the world. It is AMAZINGLY tough, which has been proven countless times in tests, and still holds a GREAT edge (tests also prove this a lot). While not being a stainless steel, it does resist rust very well. Cliff Stamp's website has some tests on the rust resistance of INFI. It is probably equivalent to D2 in rust resistance, and D2 is considered a semi-stainless. Plus, when it does rust, the rust doesn't seem to hurt the cutting edge as much as it does on stainless VG-10 steel (used by fallkniven, spyderco, and others). Cliff Stamp says this in his test on the subject. I'll give a link to his website later.
Well, the Busse Basic models come with Modified INFI, not INFI. Modified INFI, while still a great steel, is quite inferior to INFI. It is supposed to be tougher, but some tests don't exactly suggest that. Try Cliff Stamp's website. It contains detailed comparisons of INFI vs M-INFI, as well as Basic Models vs. Combat Models, which come with regular INFI steel. They are very complete and detailed; great reviewing and testing. Here are the links:
main website:
http://www.physics.mun.ca/~sstamp/knives/reviews.html
M-INFI vs INFI and another steel:
http://www.physics.mun.ca/~sstamp/knives/INFI_10V.html
Review of Basic #7:
http://www.physics.mun.ca/~sstamp/knives/busse_basic.html
Busse Battle Mistress (from the Combat series; it has an INFI blade):
http://www.physics.mun.ca/~sstamp/knives/busse_bm.html
Moving on to the sheathes...I don't know where you plan on buying this knife from, but the leather sheathes are discontinued now. Kydex is now standard; a pretty good improvement. The best price I've found is at
www.Discountknives.com ...I think they come with Kydex there. There are also a lot of other online knife stores that have good prices and come with kydex sheathes. I don't know of a place where leather sheathes are pictured; sorry.
Anyway, hope that helped.
BTW, the Basic #5 is my favorite Basic. It has a pretty sharp point, lending itself to tactical uses and self defense, plus it is a pretty compact little package with plenty of toughness. A great knife IMHO.
[This message has been edited by Andrew Lynch (edited 03-22-2001).]
[This message has been edited by Andrew Lynch (edited 03-22-2001).]