> For the complete documentation index, see [llms.txt](https://docs.alt.town/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.alt.town/user-guide/dna-trading/presale-buy.md).
# Pre-sale
## **DNA Purchase (Pre-sale)**
1. Select the round you wish to participate in and proceed to the DNA order page.
2. When purchasing DNA, you can use the entire amount by selecting 'Maximum,' or if you want to buy only a portion, you can manually enter an amount or choose from 25%, 50%, or 75%.
*📍 The base selling price is determined directly by the Alt. The minimum purchase amount for the pre-sale is 100 KEY, and the maximum purchase amount is limited to 1,000,000 KEY. The maximum purchase limit for the entire round is 10,000 DNA per Alt.*
3. Click the ‘Buy’ button to immediately execute the purchase order for the specified amount.
4. You can check the purchased Alt DNA under the ‘DNA’ tab - ‘Owned’.