Hi guys! First time posting here. Getting older and finally getting a watch. I love the look of simple dress watches and there are some really pretty vintage Omega seamasters, JLCs and Girard Perregauxs for cheap. However, 99% of these watches do not have the original strap. Are these (not having original straps) very common and how much would you think is a good price point i should pay for them? Does 400-600 USD sound good? Thanks a lot guys.