Maytag MAV6000Aww washer-loud noise when spinning

Question

Machine started making loud noise when spinning. It sounds like it is going to 'take off', you can hear it throughout the house. I had a repairman out & he said the seal was shot and in order to replace that I needed a new tub (NC for the tub). Is it worth fixing? Is this a problem with these machines? we did notice a small amount of water under the machine a few weeks ago but had drain problems so we waited til that was fixed-haven't noticed water since. It is only 6 years old 7 I paid a good amount for it! My husband is handy-is this something we can fix ourselves for alot less? They quotes me $250+/- for seal and 1-1/2-2 hrs. labor.