yes, husband declares bankruptcy, housewife suffers with busy finding new job, applying her own credit card, car loan but find out she has no credit history since all she used before was under her husband's name.
anyway, it's a tragedy for both man and woman, for the family if there's children involved. all the best for lz.
If all you need is an estimate on market value, a realtor is more than capable to provide that to you, usually free of charge (for potential future business).
A full appraisal done by an appraiser will cost at least $250 or more depending on where you live. The appraiser can provide you with a fairly detailed report on the property, and establish a value estimate based on comparable sales in the neighbourhood. I guess you may find it an overkill for your need.
For quick and rough estimate, you may want to try the following website. It's not as solid as some commercial AVMs, but hey, it's free: