Pathfinder E6 limits PC level to 6th to disallow the players from using level 4+ spells. This means, for example, that resurrection of a fallen friend is not what PCs can normally do, nor can they teleport, etc.
However, there is one simple way to access high-level magic in E6: spellcasting services, which cost Caster Level*Spell Level*10 GP. This always 2.5 times cheaper than a scroll which costs CL*Spell Level*25 GP. This somewhere around 280 GP for a 4th level spell, and, granted that you find a settlement big enough, you don't need to work hard to find it on sale. For a 5th level spell, service cost is somewhat close to 450 GP, while a scroll of the same level costs 1125 GP.
Of course, to use, say Reincarnate, PCs need 1000 more GP to pay for material components, and they would likely also want two uses of Restoration, each worth 1000 GP, to get rid of negative levels, each cast also costing 280 GP for spellcasting service... But hey, death is no longer permanent for them.
Overall, this means that reincarnating a dead adventurer costs 3000+840=3840 GP, which is a lot, but certainly not completely unavailable for E6 characters.
In my opinion, this can kinda break the very idea of E6 if allowed to be used as by RAW.
Can it kill a E6 game? Should I prevent this as a game master? If yes, how? Should I limit the availability of such services? Should I completely scrap those rules?
I expect answers from people who have used spellcasting service rules in their Pathfinder E6 games, or have made a deliberate decision not to use them.