English to Italian Other Fisheries

How to take two pretakes on the same lotnumber.
XXX offers the possibility to take two pretakes on the same lotnumber.
With this method you a have the certainty to buy a small amount of fish for a high price.
When the price further descends it is possible to buy the whole lot for a smaller amount.

Si parla di un software per partecipare ad aste ittiche. Non ho altro contesto. Credo si tratti di terminologia specifica delle aste, ma non ho trovato niente.

Grazie per il vostro aiuto