The shop sells random equipment based on your Shop Tier. Higher tiers unlock better rarity chances.

RARITY CHANCES BY TIER

Shop Tier	Items	Upgrade Cost	Normal	Good	Rare	Epic	Legendary	Mythic
1		800	100.0%	—	—	—	—	—
2		1,200	76.0%	20.0%	4.0%	—	—	—
3		2,000	68.0%	25.5%	6.0%	0.5%	—	—
4		3,500	58.5%	31.0%	9.5%	1.0%	—	—
5		6,000	49.0%	36.5%	13.0%	1.5%	—	—
6		10,000	38.9%	42.3%	16.7%	2.0%	0.1%	—
7		15,000	28.8%	48.1%	20.3%	2.5%	0.3%	—
8		21,000	17.7%	54.4%	23.9%	3.5%	0.4%	—
9		27,000	6.6%	60.7%	27.6%	4.5%	0.6%	—
10		35,000	—	62.3%	31.4%	5.5%	0.8%	0.0%
11		44,000	—	57.3%	35.1%	6.6%	0.9%	0.1%
12		53,000	—	52.3%	38.9%	7.6%	1.0%	0.2%
13		63,000	—	47.3%	42.6%	8.7%	1.2%	0.2%
14		75,000	—	42.3%	46.4%	9.8%	1.4%	0.3%
15		86,000	—	37.3%	50.1%	10.8%	1.5%	0.3%
16		99,000	—	32.3%	53.9%	11.8%	1.6%	0.4%
17	—	113,000	—	27.3%	57.6%	12.9%	1.8%	0.4%
18	—	127,000	—	22.3%	61.4%	14.0%	1.9%	0.5%
19	—	142,000	—	17.3%	65.1%	15.0%	2.1%	0.5%
20	—	158,000	—	12.3%	68.8%	16.1%	2.3%	0.6%