All runes are legit.

Some gameplay tips:

# Name Level Drop Rate Boss (Best Drop) Difficulty

1 El 11 50.0570% Countess Normal

2 Eld 11 35.7067% Countess Normal

3 Tir 13 25.2019% Countess Nightmare

4 Nef 13 17.3264% Countess Nightmare

5 Eth 15 18.1371% Countess Nightmare

6 Ith 15 12.3528% Countess Nightmare

7 Tal 17 15.2770% Countess Nightmare

8 Ral 19 10.3674% Countess Nightmare

9 Ort 21 10.8664% Countess Nightmare

10 Thul 23 7.3346% Countess Nightmare

11 Amn 25 6.7373% Countess Nightmare

12 Sol 27 4.5255% Countess Nightmare

13 Shael 29 3.5940% Countess Nightmare

14 Dol 31 2.4055% Countess Nightmare

15 Hel - 1.8576% Countess Nightmare

16 Io 35 1.2409% Countess Nightmare

17 Lum 37 0.9323% Countess Hell

18 Ko 39 0.6222% Countess Hell

19 Fal 41 0.4701% Countess Hell

20 Lem 43 0.3136% Countess Hell

21 Pul 45 0.2361% Countess Hell

22 Um 47 0.1574% Countess Hell

23 Mal 49 0.1352% Countess Hell

24 Ist 51 0.0901% Countess Hell

25 Gul 53 0.0011% Andariel Hell

26 Vex 55 0.0008% Andariel Hell

27 Ohm 57 0.0011% Andariel Hell

28 Lo 59 0.0004% Andariel Hell

29 Sur 61 0.0004% Duriel Hell

30 Ber 63 0.0002% Duriel Hell

31 Jah 65 0.0002% Mephisto Hell

32 Cham 67 0.0001% Mephisto Hell

33 Zod 69 0.00003% Baal Hell

So to farm runes, it's best to farm nightmare Countess for middle runes and Hell Countess for high runes.

#	Name	Level	Drop Rate	Boss (Best Drop)	Difficulty
1	El	11	50.0570%	Countess	Normal
2	Eld	11	35.7067%	Countess	Normal
3	Tir	13	25.2019%	Countess	Nightmare
4	Nef	13	17.3264%	Countess	Nightmare
5	Eth	15	18.1371%	Countess	Nightmare
6	Ith	15	12.3528%	Countess	Nightmare
7	Tal	17	15.2770%	Countess	Nightmare
8	Ral	19	10.3674%	Countess	Nightmare
9	Ort	21	10.8664%	Countess	Nightmare
10	Thul	23	7.3346%	Countess	Nightmare
11	Amn	25	6.7373%	Countess	Nightmare
12	Sol	27	4.5255%	Countess	Nightmare
13	Shael	29	3.5940%	Countess	Nightmare
14	Dol	31	2.4055%	Countess	Nightmare
15	Hel	-	1.8576%	Countess	Nightmare
16	Io	35	1.2409%	Countess	Nightmare
17	Lum	37	0.9323%	Countess	Hell
18	Ko	39	0.6222%	Countess	Hell
19	Fal	41	0.4701%	Countess	Hell
20	Lem	43	0.3136%	Countess	Hell
21	Pul	45	0.2361%	Countess	Hell
22	Um	47	0.1574%	Countess	Hell
23	Mal	49	0.1352%	Countess	Hell
24	Ist	51	0.0901%	Countess	Hell
25	Gul	53	0.0011%	Andariel	Hell
26	Vex	55	0.0008%	Andariel	Hell
27	Ohm	57	0.0011%	Andariel	Hell
28	Lo	59	0.0004%	Andariel	Hell
29	Sur	61	0.0004%	Duriel	Hell
30	Ber	63	0.0002%	Duriel	Hell
31	Jah	65	0.0002%	Mephisto	Hell
32	Cham	67	0.0001%	Mephisto	Hell
33	Zod	69	0.00003%	Baal	Hell

[D2R Ladder] #31 Jah Rune
$0.55

[D2R Ladder] #24 Ist Rune
$0.75

[D2R Ladder] #33 Zod Rune
$0.25

[D2R Ladder] #27 Ohm Rune
$0.29

[D2R Ladder] #26 Vex Rune
$0.25

[D2R Ladder] #32 Cham Rune
$0.15

[D2R Ladder] #22 Um Rune
$0.09

[D2R Ladder] Stone of Jordan Ring
$0.45

[D2R Ladder] #28 Lo Rune
$0.29

[D2R Ladder] Annihilus (unidentified)
$0.35

[D2R Ladder] #23 Mal Rune
$0.55

[D2R Ladder] #29 Sur Rune
$0.29