Here's my top ten balisongs
1) BM 42
2) Ikoma Guardian Angel II
3) Ikoma Guardian Angel
4) Samson weehawk-tanto
5) Samson weehawk w/ black micarta
6) Balibalistic Lum-style tanto
7) Marlowe channel scimitar
8) Samson Ti signed custom protos
9) Marlowe Talwar profile
10) Dobruski weehawk-tanto
Production only, based on my preferences:
1) BM 42
2) BM 42-400
3) BM 47 BLK SL
4) Tachyon (with black blade)
5) BM 42SS
6) BM 42 SSC
7) BM 31-02
8) Parker custom series
9) Compass Industries Cho-No-Shi
10) Pacific Cutlery model 43
Production only, based on what I think you mean by your question:
1) BM 42 (and variations such as 42-400, 42C, 42MC, 42BLK, 42SS, 42SS-01 . . .)
2) BM 43 (and variations such as 43MC and 43-401)
3) BM 47 (and variations such as 47MC and 47-BLK)
4) BM 42-01
5) Tachyon
6) Pacific Cutlery model 43
7) Pacific Cutlery model 68
8) Arc Angel
9) Parker custom series
10) Compass Industries Cho-No-Shi
Or, if you mean production balis that hard to find and therefore collectible:
1) PCC 9
2) PCC 67
3) BM 48 2nd
4) BM 45 HD
5) BM 46DM
6) BM 49-SPL
7) PCC 129
8) PCC 43
9) PCC 69
10) BM 43-401
11) Parker Custom Series
12) Cho-No-Shi