The average value of ex-fleet and lease vans sold at BCA rose Â£88 to Â£7,179 in May, 1.2% higher than in April.
BCA Commercial Pulse reported that retained value against MRP (manufacturer recommended price) improved by half a percentage point to 36.58%.
Year-on-year, values were up by Â£393 (5.7%), with average age and mileage declining when compared to the same period in 2016.
The overall average light commercial vehicle valueÂ improved by Â£21 to Â£6,452 in May.
Volumes continued to rise during the month, with higher value corporate stock increasing its share of the mix which will have impacted the average values achieved.
Countering this, volumes of late-plate rental vans continued to decline.
Year-on-year values continue to be well ahead, however, up by Â£560, equivalent to a 9.5% increase.
Average age and mileage continued to decline, largely as a result of the influx of younger rental stock over recent months.
Duncan Ward, BCAâ€™s LCV operations director, said: â€œBuyer demand was patchy during May as professional buyers had a choice from a wide selection of stock and inevitably cherry-picked the best presented and most desirable vehicles.
The bank holidays and half-term were additional distractions that fragmented demand during the month.”
He added: â€œThe model mix continues to change as rental volumes ease, and 4×4 double cab volumes continue to rise.
“The latter sector continues to experience price pressure and this can make guide values look overly optimistic.
“Condition and specification remain as important as ever and sellers should be aware that it is vital to appraise and value vehicles accurately to reflect current market sentiment.â€