Depends on the sizes and other characteristics desired by Buyer. There are often trade-offs between such characteristics as dimensions (target dimensions, consistency in dimensions, etc); colors (target colors, consistency of colors, etc); weathering (# of original weathered faces, etc); amount of rustic character; stability; reclaimed vs not reclaimed; and other characteristics.
Buyer is welcome to provide input on the timber characteristics that are most important to Buyer when submitting a timber list for quote. Buyer priorities will impact other characteristics. For example, if maximizing the percentage of reclaimed timbers and original weathered faces is important, Buyer will generally need to be more flexible with dimensions and allow significant rustic character and variation. If Buyer especially values consistency (in dimensions, colors, and other characteristics) and/or wants minimal rustic character, the amount of non-reclaimed timbers and fresh-sawn timber faces (that need to be juiced) will likely increase significantly (and the average stability of the timber package will decrease.) No matter what Buyer's preferences are, Buyer will need to have some flexibility and understand that there will be differences between timbers (and even within a timber.)