Clone JBC 115/210/245 tips are down to $10-16 now:
https://www.aliexpress.us/item/3256803976467917.html
https://www.aliexpress.us/item/3256804158794977.html
That said, i've not seen conclusive testing if the clone JBC tips are good. Some users here posted bad fit between the heater and pressed on tip. The thermocouple inside IF constructed the same way that JBC does it, should be good.
The clone T12 tips are generally OK at only $2-5 each, but not as good as genuine Hakko tips ($15/ea). Higher failure rates and lower thermal performance.
Yes, WAY more variety for T12. Its nice to get a handful of tips just to try the various styles out, even some of the weird specialized types.
The Oss tips are even available for just €5 (free shipment for orders over €10):
https://a.aliexpress.com/_ExsMcnbMultiple people having issues with them though. And most good reviews are by people who haven't used them yet or just for a short period (also no temperature testing and such).
One person with an A9 said they (or at least one) didn't work on his A9. Another said that it burned the tip after 10 seconds at 390°C with his A9 while the tip that came with it can handle 400°C.
Here's a product page of the Relife tips with more reviews:
https://a.aliexpress.com/_ExNfOprQuality wise they might be a little bit better but still nowhere near original. Also two people mentioned it doesn't work with the Aifen A9.
Another issue is that they only have 3 types available, all in just one size.
There's some brand with a bigger selection, but they cost €13-14 and the durability remains a question:
https://a.aliexpress.com/_Ewm1BRfhttps://a.aliexpress.com/_Eu0mXkhhttps://a.aliexpress.com/_EJHXdhLhttps://a.aliexpress.com/_EzHaV3r You can get T12 clones in (pretty much) every type and size available, even a lot of specialty ones (those are more expensive, but original would cost upwards of €100), like these spade tips for example:
https://a.aliexpress.com/_EIXZDZLFor myself I ordered a 10-pack and two separate T12 tips from the official Quicko store. The 10-pack costed me €25,60 and the seperate ones €3,67 a pop. After discount it costed just €29,75 for twelve tips.