how much do you think 25 feet of 2 x 4 x 13 wood would cost?

Answer 1

wow very impressive you live in a 4 dimensional world. perhaps you mean 24 x 13mm which is about £1 for an 8' length.
If you mean 4" x 2" in 13 ft lengths you Will need 2 which will cost you around £12

Answer 2

how about a 2x4x12 they don't make a 13 ft board, comes in 1 ft lenghts, so next lenght would be a 14 ft, depends on whether you need treated or not, here there $8 for a 12 ft 2x4, treated, so you need to clarify