This was my initial feeling, run. I checked with the location where the owners had purchased the trailer and had all maintenance done on it. The top had been replaced with full syn-rubber after the delams were checked and found to be non-structural. After a proper waiting period, ~around one year the roof seal was checked the sides re-inspected and found to be in no different condition.
Would I purchase one that had not had this work done and inspected? No. Would I purchase one that had this done and warranted by a reputable shop? Only at a steep discount to the market. Have I had good luck with the trailer since purchasing? Yes, it has served well and the delam is not progressing.