Personally i am finding that the answer happens to be "all of them". I know i am probably more interested in anvils than most but figured i would share a few pictures of some that i have picked up so far. The first shot shows the back of my truck loaded up for last summers hammer-in in Regina. Left side is my first anvil, an 1896 Mousehole weighing 168lbs and missing about 2.5 inches of face behind the Hardy hole. The right hand side background anvil was my second purchase and is a 1911 Peter Wright weighing in at 131lbs. the Front anvil is my Brooks pictured later. Next up shows my wrought iron Attwood, dating somwehere between 1840-1870 which is my lightweight at 72lbs. This little guy is sitting on my absolute favorite anvil, a wrought iron, Brooks from around 1830. It weighs 140 lbs and is an absolute joy to work on. Its also rare enough to half stump Mr Postman, and when looking for value was told, "seriously just dont sell it". The true wrought Brooks anvils from this era are sometimes known as Sasquatches, because even though people say they exist, most people never really see one. It is confirmed as a wrought anvil but the quality of forging made me double check that it was not in fact cast. For a forged anvil the symmetry and finish is astounding in person. Its the small multi piece weld lines that give it away. This picture shows my largest anvil, another recent acquisition, which is a more modern 200lb Westeel. It is a cast steel anvil, the majority of the 200lbs seems to be in the face as the waist is very skinny but the face is far longer than any of my others. I havent actually even used this one yet so cant speak to performance but rebound is excellent. Not pictured is the anvil i have not been able to pick up yet, and will be the permanent centerpiece in my collection, a giant bridge anvil weighing over 300lbs. Im not sure how much over 300, just that it was heavy enough to pin the 300lb scale it was placed on. The deal has been made and i have seen it in person but have not been able to pick it up yet, as i was on my motorcycle at the time haha. I am not in a huge hurry to pick it up, since i know the seller well enough to know its not going anywhere, so it can wait until i make the rather long trip back there. As a side note i do know of quite a few anvils kicking around that i have passed on for a variety of reasons (too similar to what i have, have same in slightly better shape, didnt have cash on me at the time etc). If someone is serious and looking, let me know, as we can probably hammer something out to get you hooked up.