Those are definitely nice pieces.
I got lucky and randomly walked into my LPS
and realized that they had tons of mature driftwood already in their tank and they were all for sale. I have two really nice pieces. One is a piece of wormwood that my loaches love tunneling through. I have combined the wood now with cliffstone for the aquascaping and it looks great. I will take new pictures soon to share. Here is a picture with the wormwood in the background. It is a medium size piece.
Before I stumbled into the store I had peviously considered this....Aquarium Driftwood malaysian african driftwood
The images are of the actual pieces you would buy. I recommend the site and have order many plants from them. Driftwood can get pricey, but if you see something you like, you may decide that it is worth it.