GoDaddy's appraiser is trash and Estibot can't reliably appraise abbreviated domains.
Four letter domains are mainly of interest to the Chinese, where the letters refer to the initial letter of the canonical romanization of Chinese (also called Pinyin). For example 全球计算 (Quán Qiú Jì Suàn) could use either quanqiujisuan.com or qqjs.com.
So what about your domain? Well there are two issues. The letter "a" is extremely limited in China, and "v" is never used. So your domain has little to no value to Chinese end-users.
So what about Western end-users? Well, we don't really use four letter-domains unless they're pronounceable.
In fact, the only reason all four-letter domains are registered is because western domainers didn't understand the Chinese market.
No value.